layout/mathml/nsMathMLmoFrame.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef nsMathMLmoFrame_h___
   7 #define nsMathMLmoFrame_h___
   8
   9 #include "mozilla/Attributes.h"
  10 #include "nsMathMLTokenFrame.h"
  11 #include "nsMathMLChar.h"
  12
  13 //
  14 // <mo> -- operator, fence, or separator
  15 //
  16
  17 class nsMathMLmoFrame : public nsMathMLTokenFrame {
  18 public:
  19   NS_DECL_FRAMEARENA_HELPERS
  20
  21   friend nsIFrame* NS_NewMathMLmoFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
  22
  23   virtual eMathMLFrameType GetMathMLFrameType() MOZ_OVERRIDE;
  24
  25   virtual void
  26   SetAdditionalStyleContext(int32_t          aIndex,
  27                             nsStyleContext*  aStyleContext) MOZ_OVERRIDE;
  28   virtual nsStyleContext*
  29   GetAdditionalStyleContext(int32_t aIndex) const MOZ_OVERRIDE;
  30
  31   virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
  32                                 const nsRect&           aDirtyRect,
  33                                 const nsDisplayListSet& aLists) MOZ_OVERRIDE;
  34
  35   NS_IMETHOD
  36   InheritAutomaticData(nsIFrame* aParent) MOZ_OVERRIDE;
  37
  38   NS_IMETHOD
  39   TransmitAutomaticData() MOZ_OVERRIDE;
  40
  41   virtual void
  42   SetInitialChildList(ChildListID     aListID,
  43                       nsFrameList&    aChildList) MOZ_OVERRIDE;
  44
  45   virtual void
  46   Reflow(nsPresContext*          aPresContext,
  47          nsHTMLReflowMetrics&     aDesiredSize,
  48          const nsHTMLReflowState& aReflowState,
  49          nsReflowStatus&          aStatus) MOZ_OVERRIDE;
  50
  51   virtual nsresult
  52   Place(nsRenderingContext& aRenderingContext,
  53         bool                 aPlaceOrigin,
  54         nsHTMLReflowMetrics& aDesiredSize) MOZ_OVERRIDE;
  55
  56   virtual void MarkIntrinsicISizesDirty() MOZ_OVERRIDE;
  57
  58   virtual void
  59   GetIntrinsicISizeMetrics(nsRenderingContext* aRenderingContext,
  60                            nsHTMLReflowMetrics& aDesiredSize) MOZ_OVERRIDE;
  61
  62   virtual nsresult
  63   AttributeChanged(int32_t         aNameSpaceID,
  64                    nsIAtom*        aAttribute,
  65                    int32_t         aModType) MOZ_OVERRIDE;
  66
  67   // This method is called by the parent frame to ask <mo>
  68   // to stretch itself.
  69   NS_IMETHOD
  70   Stretch(nsRenderingContext& aRenderingContext,
  71           nsStretchDirection   aStretchDirection,
  72           nsBoundingMetrics&   aContainerSize,
  73           nsHTMLReflowMetrics& aDesiredStretchSize) MOZ_OVERRIDE;
  74
  75   virtual nsresult
  76   ChildListChanged(int32_t aModType) MOZ_OVERRIDE
  77   {
  78     ProcessTextData();
  79     return nsMathMLContainerFrame::ChildListChanged(aModType);
  80   }
  81
  82 protected:
  83   explicit nsMathMLmoFrame(nsStyleContext* aContext) : nsMathMLTokenFrame(aContext) {}
  84   virtual ~nsMathMLmoFrame();
  85
  86   nsMathMLChar     mMathMLChar; // Here is the MathMLChar that will deal with the operator.
  87   nsOperatorFlags  mFlags;
  88   float            mMinSize;
  89   float            mMaxSize;
  90
  91   bool UseMathMLChar();
  92
  93   // overload the base method so that we can setup our nsMathMLChar
  94   void ProcessTextData();
  95
  96   // helper to get our 'form' and lookup in the Operator Dictionary to fetch
  97   // our default data that may come from there, and to complete the setup
  98   // using attributes that we may have
  99   void
 100   ProcessOperatorData();
 101
 102   // helper to double check thar our char should be rendered as a selected char
 103   bool
 104   IsFrameInSelection(nsIFrame* aFrame);
 105 };
 106
 107 #endif /* nsMathMLmoFrame_h___ */